Relays are used to separate two different voltage levels. A PLC could be used to regulate the functioning of a 2,300V or 4,160V medium-voltage motor. While the PLC controls the relay, it is used to energise the starter, which then switches the motor voltage.
Programmable relays combine the advantages of a PLC with a lower level of complexity and expense. In instances where fewer I/O points are required, programmable relays are employed. Smart relays are capable of performing a wide range of activities, including counting, timing, and real-time clock functions.
PLCs are far more dependable and troubleshooting is lot easier. Relays' mechanical functionalities simply wear out with time. Furthermore, the wiring required to operate a relay system is far more complicated than that required to operate a PLC system. Due to additional labour costs, this may result in increased installation and upgrade charges.
The basic functions of both a relay and a PLC are the same: to control electro-mechanical equipment in the workplace. Simple operations, like as starting/stopping an electric motor after detecting an overload or malfunction, can be accomplished by both efficiently.
Small Signal Relays.
Time Delay Relays.
plc ka work kon kon karta hai
NIROJ PALAI,EEE(2021) Vel Tech, Chennai
this very useful for electrical engineering diploma student
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I saw small amount of mistake in video sir you should write v=24 watts
That is volt please because your video is awesome
Good for instrumentation and control engineering and electronics branch students
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